all: import netsniff-ng 0.5.8-rc0 source

We decided to get rid of the old Git history and start a new one for
several reasons:

 *) Allow / enforce only high-quality commits (which was not the case
    for many commits in the history), have a policy that is more close
    to the one from the Linux kernel. With high quality commits, we
    mean code that is logically split into commits and commit messages
    that are signed-off and have a proper subject and message body.
    We do not allow automatic Github merges anymore, since they are
    total bullshit. However, we will either cherry-pick your patches
    or pull them manually.

 *) The old archive was about ~27MB for no particular good reason.
    This basically derived from the bad decision that also some PDF
    files where stored there. From this moment onwards, no binary
    objects are allowed to be stored in this repository anymore.

The old archive is not wiped away from the Internet. You will still
be able to find it, e.g. on git.cryptoism.org etc.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

1 files changed, 469 insertions, 0 deletions

diff --git a/proto_lldp.c b/proto_lldp.c
new file mode 100644
index 0000000..22b7684
--- /dev/null
+++ b/proto_lldp.c
@@ -0,0 +1,469 @@
+/*
+ * netsniff-ng - the packet sniffing beast
+ * Copyright 2012, 2013 Tobias Klauser <tklauser@distanz.ch>
+ * Subject to the GPL, version 2.
+ */
+
+#include <stdint.h>
+#include <arpa/inet.h>		/* for inet_ntop() */
+#include <netinet/in.h>		/* for ntohs()/ntohl() */
+
+#include "built_in.h"
+#include "oui.h"
+#include "pkt_buff.h"
+#include "proto.h"
+#include "protos.h"
+#include "xutils.h"
+
+#define EXTRACT_16BIT(x)	ntohs(*((uint16_t *) (x)))
+#define EXTRACT_32BIT(x)	ntohl(*((uint32_t *) (x)))
+
+#define LLDP_TLV_TYPE(tlv)	(((tlv) & 0xFE00) >> 9)
+#define LLDP_TLV_LENGTH(tlv)	 ((tlv) & 0x01FF)
+
+/*
+ * LLDP TLV types
+ */
+#define LLDP_TLV_END			0
+#define LLDP_TLV_CHASSIS_ID		1
+#define LLDP_TLV_PORT_ID		2
+#define LLDP_TLV_TTL			3
+#define LLDP_TLV_PORT_DESC		4
+#define LLDP_TLV_SYSTEM_NAME		5
+#define LLDP_TLV_SYSTEM_DESC		6
+#define LLDP_TLV_SYSTEM_CAP		7
+#define LLDP_TLV_MGMT_ADDR		8
+#define LLDP_TLV_ORG_SPECIFIC		127
+
+/*
+ * Chassis ID subtypes
+ */
+#define LLDP_CHASSIS_SUBTYPE_CHASSIS	1
+#define LLDP_CHASSIS_SUBTYPE_IF_ALIAS	2
+#define LLDP_CHASSIS_SUBTYPE_PORT	3
+#define LLDP_CHASSIS_SUBTYPE_MAC_ADDR	4
+#define LLDP_CHASSIS_SUBTYPE_NET_ADDR	5
+#define LLDP_CHASSIS_SUBTYPE_IF_NAME	6
+#define LLDP_CHASSIS_SUBTYPE_LOCAL	7
+
+/*
+ * Port ID subtypes
+ */
+#define LLDP_PORT_SUBTYPE_IF_ALIAS	1
+#define LLDP_PORT_SUBTYPE_PORT_COMP	2
+#define LLDP_PORT_SUBTYPE_MAC_ADDR	3
+#define LLDP_PORT_SUBTYPE_NET_ADDR	4
+#define LLDP_PORT_SUBTYPE_IF_NAME	5
+#define LLDP_PORT_SUBTYPE_AGENT_CIRC_ID	6
+#define LLDP_PORT_SUBTYPE_LOCAL		7
+
+/*
+ * System capabilits bit masks
+ */
+#define LLDP_SYSTEM_CAP_OTHER		(1 << 0)
+#define LLDP_SYSTEM_CAP_REPEATER	(1 << 1)
+#define LLDP_SYSTEM_CAP_BRIDGE		(1 << 2)
+#define LLDP_SYSTEM_CAP_WLAN_AP		(1 << 3)
+#define LLDP_SYSTEM_CAP_ROUTER		(1 << 4)
+#define LLDP_SYSTEM_CAP_TELEPHONE	(1 << 5)
+#define LLDP_SYSTEM_CAP_DOCSIS		(1 << 6)
+#define LLDP_SYSTEM_CAP_STATION_ONLY	(1 << 7)
+
+/*
+ * Interface number subtypes (for Management addres TLV)
+ */
+#define LLDP_IFACE_NUM_SUBTYPE_UNKNOWN	1
+#define LLDP_IFACE_NUM_SUBTYPE_IF_INDEX	2
+#define LLDP_IFACE_NUM_SUBTYPE_SYS_PORT	3
+
+/*
+ * IANA address family numbers (only the ones we actually use)
+ * http://www.iana.org/assignments/address-family-numbers/address-family-numbers.txt
+ *
+ * TODO: Move these into own header if there are other users?
+ */
+#define IANA_AF_IPV4	1
+#define IANA_AF_IPV6	2
+#define IANA_AF_802	6
+
+static int lldp_print_net_addr(const uint8_t *addr, size_t addrlen)
+{
+	uint8_t af;
+	char buf[64];
+
+	if (addrlen < 1)
+		return -EINVAL;
+
+	af = *addr++;
+	addrlen--;
+	switch (af) {
+	case IANA_AF_IPV4:
+		if (addrlen < 4)
+			return -EINVAL;
+		inet_ntop(AF_INET, addr, buf, sizeof(buf));
+		tprintf("%s", buf);
+		break;
+	case IANA_AF_IPV6:
+		if (addrlen < 16)
+			return -EINVAL;
+		inet_ntop(AF_INET6, addr, buf, sizeof(buf));
+		tprintf("%s", buf);
+		break;
+	case IANA_AF_802:
+		if (addrlen < 6)
+			return -EINVAL;
+		tprintf("%.2x:%.2x:%.2x:%.2x:%.2x:%.2x",
+			addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
+		break;
+	default:
+		tprintf("unknown address family");
+		break;
+	}
+
+	return 0;
+}
+
+static void lldp_print_cap(uint16_t cap)
+{
+	unsigned int prev = 0;
+
+	if (cap & LLDP_SYSTEM_CAP_OTHER)
+		tprintf("%sOther", prev++ ? ", " : "");
+	if (cap & LLDP_SYSTEM_CAP_REPEATER)
+		tprintf("%sRepeater", prev++ ? ", " : "");
+	if (cap & LLDP_SYSTEM_CAP_BRIDGE)
+		tprintf("%sBridge", prev++ ? ", " : "");
+	if (cap & LLDP_SYSTEM_CAP_WLAN_AP)
+		tprintf("%sWLAN AP", prev++ ? ", " : "");
+	if (cap & LLDP_SYSTEM_CAP_ROUTER)
+		tprintf("%sRouter", prev++ ? ", " : "");
+	if (cap & LLDP_SYSTEM_CAP_TELEPHONE)
+		tprintf("%sTelephone", prev++ ? ", " : "");
+	if (cap & LLDP_SYSTEM_CAP_DOCSIS)
+		tprintf("%sDOCSIS", prev++ ? ", " : "");
+	if (cap & LLDP_SYSTEM_CAP_STATION_ONLY)
+		tprintf("%sStation only", prev++ ? ", " : "");
+}
+
+static void lldp(struct pkt_buff *pkt)
+{
+	unsigned int n_tlv = 0;
+	uint8_t subtype, mgmt_alen, mgmt_oidlen;
+	uint16_t tlv_hdr;
+	unsigned int tlv_type, tlv_len;
+	unsigned int len;
+	uint8_t *tlv_info_str;
+	uint16_t sys_cap, en_cap;
+	uint32_t oui;
+
+	len = pkt_len(pkt);
+	if (len == 0)
+		return;
+
+	tprintf(" [ LLDP ");
+
+	while (len >= sizeof(tlv_hdr)) {
+		tlv_hdr = EXTRACT_16BIT(pkt_pull(pkt, sizeof(tlv_hdr)));
+		tlv_type = LLDP_TLV_TYPE(tlv_hdr);
+		tlv_len = LLDP_TLV_LENGTH(tlv_hdr);
+
+		len -= sizeof(tlv_hdr);
+
+		if (tlv_type == LLDP_TLV_END && tlv_len == 0) {
+			/* Chassis ID, Port ID and TTL are mandatory */
+			if (n_tlv < 3)
+				goto out_invalid;
+			else
+				break;
+		}
+		if (len < tlv_len)
+			goto out_invalid;
+
+		switch (tlv_type) {
+		case LLDP_TLV_CHASSIS_ID:
+			/*
+			 * The mandatory chassis ID shall be the first TLV and
+			 * shall appear exactly once.
+			 */
+			if (n_tlv != 0)
+				goto out_invalid;
+
+			tprintf("Chassis ID");
+
+			if (tlv_len < 2)
+				goto out_invalid;
+
+			tlv_info_str = pkt_pull(pkt, tlv_len);
+			if (tlv_info_str == NULL)
+				goto out_invalid;
+
+			subtype = *tlv_info_str++;
+			tprintf(" (Subtype %u => ", subtype);
+
+			switch (subtype) {
+			case LLDP_CHASSIS_SUBTYPE_MAC_ADDR:
+				if (tlv_len < 7)
+					goto out_invalid;
+
+				tprintf("%.2x:%.2x:%.2x:%.2x:%.2x:%.2x",
+					tlv_info_str[0], tlv_info_str[1],
+					tlv_info_str[2], tlv_info_str[3],
+					tlv_info_str[4], tlv_info_str[5]);
+				break;
+			case LLDP_CHASSIS_SUBTYPE_NET_ADDR:
+				if (lldp_print_net_addr(tlv_info_str, tlv_len))
+					goto out_invalid;
+				break;
+			case LLDP_CHASSIS_SUBTYPE_CHASSIS:
+			case LLDP_CHASSIS_SUBTYPE_IF_ALIAS:
+			case LLDP_CHASSIS_SUBTYPE_PORT:
+			case LLDP_CHASSIS_SUBTYPE_IF_NAME:
+			case LLDP_CHASSIS_SUBTYPE_LOCAL:
+				tputs_safe((const char *) tlv_info_str, tlv_len - 1);
+				break;
+			default:
+				tprintf("Reserved");
+				break;
+			}
+
+			tprintf(")");
+			break;
+		case LLDP_TLV_PORT_ID:
+			/*
+			 * The mandatory port ID shall be the second TLV and
+			 * shall appear exactly once.
+			 */
+			if (n_tlv != 1)
+				goto out_invalid;
+
+			tprintf(", Port ID");
+
+			if (tlv_len < 2)
+				goto out_invalid;
+
+			tlv_info_str = pkt_pull(pkt, tlv_len);
+			if (tlv_info_str == NULL)
+				goto out_invalid;
+
+			subtype = *tlv_info_str++;
+			tprintf(" (Subtype %u => ", subtype);
+
+			switch (subtype) {
+			case LLDP_PORT_SUBTYPE_MAC_ADDR:
+				if (tlv_len < 7)
+					goto out_invalid;
+
+				tprintf("%.2x:%.2x:%.2x:%.2x:%.2x:%.2x",
+					tlv_info_str[0], tlv_info_str[1],
+					tlv_info_str[2], tlv_info_str[3],
+					tlv_info_str[4], tlv_info_str[5]);
+				break;
+			case LLDP_PORT_SUBTYPE_NET_ADDR:
+				if (lldp_print_net_addr(tlv_info_str, tlv_len))
+					goto out_invalid;
+				break;
+			case LLDP_PORT_SUBTYPE_IF_ALIAS:
+			case LLDP_PORT_SUBTYPE_PORT_COMP:
+			case LLDP_PORT_SUBTYPE_IF_NAME:
+			case LLDP_PORT_SUBTYPE_AGENT_CIRC_ID:
+			case LLDP_PORT_SUBTYPE_LOCAL:
+				tputs_safe((const char *) tlv_info_str, tlv_len - 1);
+				break;
+			default:
+				tprintf("Reserved");
+				break;
+			}
+
+			tprintf(")");
+			break;
+		case LLDP_TLV_TTL:
+			/*
+			 * The mandatory TTL shall be the third TLV and
+			 * shall appear exactly once.
+			 */
+			if (n_tlv != 2)
+				goto out_invalid;
+
+			tprintf(", TTL");
+
+			if (tlv_len != 2)
+				goto out_invalid;
+
+			tlv_info_str = pkt_pull(pkt, tlv_len);
+			if (tlv_info_str == NULL)
+				goto out_invalid;
+
+			tprintf(" (%u)", EXTRACT_16BIT(tlv_info_str));
+			break;
+		case LLDP_TLV_PORT_DESC:
+			tprintf(", Port desc (");
+
+			tlv_info_str = pkt_pull(pkt, tlv_len);
+			if (tlv_info_str == NULL)
+				tprintf("none");
+			else
+				tputs_safe((const char *) tlv_info_str, tlv_len);
+
+			tprintf(")");
+			break;
+		case LLDP_TLV_SYSTEM_NAME:
+			tprintf(", Sys name (");
+
+			tlv_info_str = pkt_pull(pkt, tlv_len);
+			if (tlv_info_str == NULL)
+				tprintf("none");
+			else
+				tputs_safe((const char *) tlv_info_str, tlv_len);
+
+			tprintf(")");
+			break;
+		case LLDP_TLV_SYSTEM_DESC:
+			tprintf(", Sys desc (");
+
+			tlv_info_str = pkt_pull(pkt, tlv_len);
+			if (tlv_info_str == NULL)
+				tprintf("none");
+			else
+				tputs_safe((const char *) tlv_info_str, tlv_len);
+
+			tprintf(")");
+			break;
+		case LLDP_TLV_SYSTEM_CAP:
+			tprintf(", Sys Cap");
+
+			if (tlv_len != 4)
+				goto out_invalid;
+
+			tlv_info_str = pkt_pull(pkt, tlv_len);
+			if (tlv_info_str == NULL)
+				goto out_invalid;
+
+			sys_cap = EXTRACT_16BIT(tlv_info_str);
+			tlv_info_str += sizeof(uint32_t);
+			en_cap = EXTRACT_16BIT(tlv_info_str);
+
+			tprintf(" (");
+			lldp_print_cap(sys_cap);
+			tprintf(")");
+			tprintf(" Ena Cap (");
+			lldp_print_cap(en_cap);
+			tprintf(")");
+			break;
+		case LLDP_TLV_MGMT_ADDR:
+			tprintf(", Mgmt Addr (");
+
+			if (tlv_len < 9 || tlv_len > 167)
+				goto out_invalid;
+
+			tlv_info_str = pkt_pull(pkt, tlv_len);
+			if (tlv_info_str == NULL)
+				goto out_invalid;
+
+			mgmt_alen = *tlv_info_str;
+			tlv_info_str++;
+			if (tlv_len - 1 < mgmt_alen)
+				goto out_invalid;
+
+			if (lldp_print_net_addr(tlv_info_str, mgmt_alen))
+				goto out_invalid;
+			tlv_info_str += mgmt_alen;
+
+			tprintf(", Iface Subtype %d/", *tlv_info_str);
+			switch (*tlv_info_str) {
+			case LLDP_IFACE_NUM_SUBTYPE_IF_INDEX:
+				tprintf("ifIndex");
+				break;
+			case LLDP_IFACE_NUM_SUBTYPE_SYS_PORT:
+				tprintf("System Port Number");
+				break;
+			default:
+				tprintf("Unknown");
+				break;
+			}
+
+			tlv_info_str++;
+			tprintf(", Iface Number %u", EXTRACT_32BIT(tlv_info_str));
+
+			tlv_info_str += 4;
+			mgmt_oidlen = *tlv_info_str;
+			if (tlv_len - mgmt_alen - sizeof(uint32_t) - 3 < mgmt_oidlen)
+				goto out_invalid;
+			if (mgmt_oidlen > 0) {
+				tprintf(", OID ");
+				tputs_safe((const char *) tlv_info_str + 1, mgmt_oidlen);
+			}
+
+			tprintf(")");
+			break;
+		case LLDP_TLV_ORG_SPECIFIC:
+			tprintf(", Org specific");
+
+			if (tlv_len < 4)
+				goto out_invalid;
+
+			tlv_info_str = pkt_pull(pkt, 4);
+			if (tlv_info_str == NULL)
+				goto out_invalid;
+
+			oui = ntohl(*((uint32_t *) tlv_info_str));
+			subtype = oui & 0xff;
+			oui >>= 8;
+			tprintf(" (OUI %s, Subtype %u)", lookup_vendor_str(oui),
+				subtype);
+
+			/* Just eat it up, we don't know how to interpret it */
+			pkt_pull(pkt, tlv_len - 4);
+			break;
+		default:
+			tprintf(", Unknown TLV %u", tlv_type);
+			pkt_pull(pkt, tlv_len);
+			break;
+		}
+
+		n_tlv++;
+	}
+
+	len -= tlv_len;
+
+	tprintf(" ]\n");
+	return;
+
+out_invalid:
+	tprintf(" %sINVALID%s ]\n", colorize_start_full(black, red),
+		colorize_end());
+}
+
+static void lldp_less(struct pkt_buff *pkt)
+{
+	unsigned int len, n_tlv = 0;
+	unsigned int tlv_type, tlv_len;
+	uint16_t tlv_hdr;
+
+	len = pkt_len(pkt);
+
+	while (len >= sizeof(tlv_hdr)) {
+		tlv_hdr = EXTRACT_16BIT(pkt_pull(pkt, sizeof(tlv_hdr)));
+		tlv_type = LLDP_TLV_TYPE(tlv_hdr);
+		tlv_len = LLDP_TLV_LENGTH(tlv_hdr);
+
+		n_tlv++;
+		len -= sizeof(tlv_hdr);
+
+		if (tlv_type == LLDP_TLV_END || tlv_len == 0)
+			break;
+		if (len < tlv_len)
+			break;
+
+		pkt_pull(pkt, tlv_len);
+
+		len -= tlv_len;
+	}
+
+	tprintf(" %u TLV%s", n_tlv, n_tlv == 1 ? "" : "s");
+}
+
+struct protocol lldp_ops = {
+	.key = 0x88cc,
+	.print_full = lldp,
+	.print_less = lldp_less,
+};